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@ARTICLE{Stein:57530,
author = {Stein, O. and Rudolph, J.},
title = {{M}odeling and interpretation of stable carbon isotope
ratios of ethane in global chemical transport models},
journal = {Journal of Geophysical Research},
volume = {112},
issn = {0148-0227},
address = {Washington, DC},
publisher = {Union},
reportid = {PreJuSER-57530},
pages = {1 - 18},
year = {2007},
note = {Record converted from VDB: 12.11.2012},
abstract = {Model calculations with two global 3D-CTMs (GISS and
MOZART-2) in which we introduced ethane stable carbon
isotopic ratios were performed. In both models, emission
inventories based on the EDGAR database are used for VOC
emissions. We considered source specific isotope
fractionations and included global emissions from C3 and C4
plants which differ significantly in isotope ratio.
Comparison of the model results with observation strongly
indicates that the EDGAR emission inventory underestimates
global ethane emissions by a factor of approximately 1.5. On
the basis of the latitude-dependent differences between
model predictions and the atmospheric observations of ethane
reported by Rudolph (1995), estimates of magnitude and
latitude range of sources missing in current emission
inventories are made. However, the concentration data alone
provide only limited constraints on the geographical
distribution and only indirect information about the type of
the missing sources. Isotope ratio studies can be very
valuable to obtain additional insight. To study the
dependence between the geographical distribution of the
emissions and atmospheric ethane concentrations and isotope
ratios, MOZART-2 model calculations were made where all
emissions are concentrated in latitude bands as well as in
specified regions. Two regimes can be distinguished on a
global scale: In the source latitude band, dilution with
background air explains most of the calculated concentration
variation, while at latitudes farther away from the sources,
chemical loss is the dominating process.},
keywords = {J (WoSType)},
cin = {ICG-2},
ddc = {550},
cid = {I:(DE-Juel1)VDB791},
pnm = {Atmosphäre und Klima},
pid = {G:(DE-Juel1)FUEK406},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000248421500005},
doi = {10.1029/2006JD008062},
url = {https://juser.fz-juelich.de/record/57530},
}